If a star contains a certain element, it can be determined by studying the star's

A. emission spectrum

B. corona

C. sunspot activity

D. main sequence

you and your friend left a bus terminal at the same time and traveled in opposite directions. Your bus was in heavy traffic and had to travel 20 miles per hour slower than your freind's bus. After 3 hours, the buses were 270 miles apart.

What combines to form bonds in compounds? A. atoms of elementsB. moleculesC. types of mineralsD. valences

A force of 58 newtons is applied to a crate at an angle of 32° with the horizontal. What is the value of force acting in the y-direction?

When an atom ion or molecule of a reactant switches places with an unpaired reactant the type of reaction is called?

Why do many species that existed 35 million years ago no longer exist

Compare and contrast the average kinetic energy of 0.5 L of coffee at 34°C, 0.5 L of coffee at 38°C, and 0.25 L of tea at 43°C.

A 7700-kg box car traveling at 14 m/s strikes a second car at rest. The two stick together and move off with a speed of 5.0 m/s. What is the mass of the second car?

What will happen if there is a change in a magnetic field?

Question 2 10 pts The voltage in a particular circuit is 10.0 V. The current in the circuit is 20 A. What is the resistance? A. 2.0 B. 30 C. 200 D. 0.5

Where in the motion is the magnitude of the net force on the object a maximum? where in the motion is the speed a maximum?